JP2017512829A5 - - Google Patents
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- JP2017512829A5 JP2017512829A5 JP2017500412A JP2017500412A JP2017512829A5 JP 2017512829 A5 JP2017512829 A5 JP 2017512829A5 JP 2017500412 A JP2017500412 A JP 2017500412A JP 2017500412 A JP2017500412 A JP 2017500412A JP 2017512829 A5 JP2017512829 A5 JP 2017512829A5
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- 150000001875 compounds Chemical class 0.000 claims 32
- 125000003118 aryl group Chemical group 0.000 claims 20
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims 18
- 125000000217 alkyl group Chemical group 0.000 claims 15
- 125000004435 hydrogen atoms Chemical group [H]* 0.000 claims 12
- 125000003545 alkoxy group Chemical group 0.000 claims 11
- 125000005843 halogen group Chemical group 0.000 claims 10
- 150000003839 salts Chemical class 0.000 claims 10
- 239000011780 sodium chloride Substances 0.000 claims 10
- 125000004432 carbon atoms Chemical group C* 0.000 claims 9
- 125000004191 (C1-C6) alkoxy group Chemical group 0.000 claims 8
- 125000002877 alkyl aryl group Chemical group 0.000 claims 8
- 125000001072 heteroaryl group Chemical group 0.000 claims 8
- 125000000896 monocarboxylic acid group Chemical group 0.000 claims 8
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 claims 7
- 229910052739 hydrogen Inorganic materials 0.000 claims 7
- 125000004433 nitrogen atoms Chemical group N* 0.000 claims 7
- 239000012453 solvate Substances 0.000 claims 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 6
- 239000001257 hydrogen Substances 0.000 claims 6
- 125000005309 thioalkoxy group Chemical group 0.000 claims 5
- 125000005213 alkyl heteroaryl group Chemical group 0.000 claims 4
- 229910052799 carbon Inorganic materials 0.000 claims 4
- 239000000203 mixture Substances 0.000 claims 4
- RWRDLPDLKQPQOW-UHFFFAOYSA-N pyrrolidine Chemical group C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 claims 4
- 125000000882 C2-C6 alkenyl group Chemical group 0.000 claims 3
- 125000003601 C2-C6 alkynyl group Chemical group 0.000 claims 3
- 125000005418 aryl aryl group Chemical group 0.000 claims 3
- 229910052731 fluorine Chemical group 0.000 claims 3
- 125000001153 fluoro group Chemical group F* 0.000 claims 3
- 125000000592 heterocycloalkyl group Chemical group 0.000 claims 3
- 238000004519 manufacturing process Methods 0.000 claims 3
- 125000006272 (C3-C7) cycloalkyl group Chemical group 0.000 claims 2
- 210000003491 Skin Anatomy 0.000 claims 2
- 230000003712 anti-aging Effects 0.000 claims 2
- 125000004429 atoms Chemical group 0.000 claims 2
- 239000002537 cosmetic Substances 0.000 claims 2
- 239000002609 media Substances 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 claims 2
- 238000009938 salting Methods 0.000 claims 2
- 230000036560 skin regeneration Effects 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 2
- 210000001124 Body Fluids Anatomy 0.000 claims 1
- 125000003342 alkenyl group Chemical group 0.000 claims 1
- 125000000304 alkynyl group Chemical group 0.000 claims 1
- 239000000560 biocompatible material Substances 0.000 claims 1
- 239000010839 body fluid Substances 0.000 claims 1
- 210000004027 cells Anatomy 0.000 claims 1
- -1 cyclic acetal Chemical class 0.000 claims 1
- 125000000753 cycloalkyl group Chemical group 0.000 claims 1
- 239000001963 growth media Substances 0.000 claims 1
- 125000000879 imine group Chemical group 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims 1
- 244000005700 microbiome Species 0.000 claims 1
- 210000000056 organs Anatomy 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 125000005545 phthalimidyl group Chemical group 0.000 claims 1
- 125000006239 protecting group Chemical group 0.000 claims 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims 1
- 210000001519 tissues Anatomy 0.000 claims 1
- 0 *C1*COCC1 Chemical compound *C1*COCC1 0.000 description 2
Claims (20)
(式中:
- mは、0又は1を表し、
- pは、0又は1を表し、
- R0は、水素原子、O-保護基又は(C1〜C6)アルキル基、(C2〜C6)アルケニル基、(C2〜C6)アルキニル基、(C3〜C7)シクロアルキル基、5員から7員までのヘテロシクロアルキル基、アリール基、ヘテロアリール基、アリール(C1〜C6)アルキル基、ヘテロアリール(C1〜C6)アルキル基、(C1〜C6)アルキルアリール基若しくは(C1〜C6)アルキルヘテロアリール基を表し、これらの基は、ハロゲン原子、(C1〜C6)アルコキシ、OH、COOH及びCHOから選択される1個若しくは複数の基によって場合により置換されており、
- R5a、R6a及びR7aは互いに独立に、水素又はN-保護基を表し、
- R5、R6及びR7は互いに独立に、水素; (C1〜C6)アルコキシ若しくは(C1〜C6)チオアルコキシによって任意選択により置換されている(C1〜C6)アルキル;アリール; (C1〜C6)アルコキシによって任意選択により置換されているアリール(C1〜C6)アルキル;又は下記式:
ここで、
- nは、1から6までの整数を表し、
- Rは、水素原子若しくはフッ素原子又はCH3基、CH2F基、CH2OSiRa1Rb1Rc1基、CH2OR8基、CH2OC(O)R9基、CH2OCO2R10基、CH2OC(O)NR11R12基、CH2OP(O)(OR13)2基若しくはCH2OSO3R14基を表し、
- R1及びR2は互いに独立に、フッ素原子又はOSiRa2Rb2Rc2基、OR15基、OC(O)R16基、OCO2R17基、OC(O)NR18R19基、OP(O)(OR20)2基若しくはOSO3R21基を表し、
- R3は、フッ素原子又はOSiRa3Rb3Rc3基、OR22基、OC(O)R23基、OCO2R24基、OCONR25R26基、OP(O)(OR27)2基、OSO3R28基、N3基、フタルイミジル基、NR29R30基、NR31C(O)R32基、NR33C(O)OR34基、N(C(O)R35)C(O)R36基、N(C(O)R37)C(O)OR38基及びN(C(O)OR39)C(O)OR40基を表し、
- R4は、水素原子若しくはハロゲン原子又はOSiRa4Rb4Rc4基、OR41基、OC(O)R42基、OCO2R43基、OCONR44R45基、OP(O)(OR46)2基若しくはOSO3R47基を表し、
又はR及びR1は、これらが結合している炭素原子と一緒になって、下記式:
- R8、R15、R22及びR41は互いに独立に、水素原子、O-保護基又は(C1〜C6)アルキル基、(C2〜C6)アルケニル基、(C2〜C6)アルキニル基、(C3〜C7)シクロアルキル基、5員から7員までのヘテロシクロアルキル基、アリール基、ヘテロアリール基、アリール(C1〜C6)アルキル基、ヘテロアリール(Cr〜C6)アルキル基、(C1〜C6)アルキルアリール基、(C1〜C6)アルキルヘテロアリール基、糖基又は多糖基を表し、これらの基は、ハロゲン原子、(C1〜C6)アルコキシ、OH、COOH及びCHOから選択される1個若しくは複数の基によって場合により置換されており、
- R9、R10、R16、R17、R23、R24、R32、R34からR40、R42及びR43は互いに独立に、(C1〜C6)アルキル基、(C2〜C6)アルケニル基、(C2〜C6)アルキニル基、(C3〜C7)シクロアルキル基、5員から7員までのヘテロシクロアルキル基、アリール基、ヘテロアリール基、アリール(C1〜C6)アルキル基、ヘテロアリール(C1〜C6)アルキル基、(C1〜C6)アルキルアリール基又は(C1〜C6)アルキルヘテロアリール基を表し、これらの基は、ハロゲン原子、(C1〜C6)アルコキシ、OH、COOH及びCHOから選択される1個又は複数の基によって場合により置換されており、
- R11、R12、R18、R19、R25、R26、R29からR31、R33、R44及びR45は互いに独立に、水素原子又は(C1〜C6)アルキル基、(C2〜C6)アルケニル基、(C2〜C6)アルキニル基、アリール基、ヘテロアリール基、アリール(C1〜C6)アルキル基、ヘテロアリール(C1〜C6)アルキル基、(C1〜C6)アルキルアリール基若しくは(C1〜C6)アルキルヘテロアリール基を表し、これらの基は、ハロゲン原子、(C1〜C6)アルコキシ、OH、COOH及びCHOから選択される1個又は複数の基によって場合により置換されており、
- R13、R14、R20、R21、R27、R28、R46及びR47は互いに独立に、水素原子又は(C1〜C6)アルキル基を表し、
- Ra1からRa4、Rb1からRb4及びRc1からRc4は互いに独立に、(C1〜C6)アルキル基、アリール基又はアリール(C1〜C6)アルキル基を表し、
- Rd及びReは互いに独立に、水素原子又は(C1〜C6)アルキル基を表す。)。 Formula (I):
( Where:
-m represents 0 or 1,
-p represents 0 or 1,
-R 0 is a hydrogen atom, O-protecting group or (C 1 -C 6 ) alkyl group, (C 2 -C 6 ) alkenyl group, (C 2 -C 6 ) alkynyl group, (C 3 -C 7 ) a cycloalkyl group, a heterocycloalkyl group of 5-membered to 7-membered, aryl, heteroaryl, aryl (C 1 ~C 6) alkyl group, heteroaryl (C 1 ~C 6) alkyl group, (C 1 ~ C 6) alkyl aryl or (C 1 -C 6) alkylheteroaryl group, these groups, a halogen atom, one or selected from (C 1 -C 6) alkoxy, OH, COOH and CHO Optionally substituted by multiple groups,
-R 5a , R 6a and R 7a independently of one another represent hydrogen or an N-protecting group,
- R 5, R 6 and R 7, independently of one another, hydrogen; (C 1 ~C 6) alkoxy or (C 1 ~C 6) are substituted by optionally by thioalkoxy (C 1 ~C 6) alkyl Aryl; (C 1 -C 6 ) alkyl optionally substituted with (C 1 -C 6 ) alkoxy; or
here,
-n represents an integer from 1 to 6,
-R is a hydrogen atom or a fluorine atom or CH 3 group, CH 2 F group, CH 2 OSiR a1 R b1 R c1 group, CH 2 OR 8 group, CH 2 OC (O) R 9 group, CH 2 OCO 2 R Represents 10 groups, CH 2 OC (O) NR 11 R 12 groups, CH 2 OP (O) (OR 13 ) 2 groups or CH 2 OSO 3 R 14 groups,
-R 1 and R 2 are independently of each other a fluorine atom or an OSiR a2 R b2 R c2 group, an OR 15 group, an OC (O) R 16 group, an OCO 2 R 17 group, an OC (O) NR 18 R 19 group, Represents OP (O) (OR 20 ) 2 groups or OSO 3 R 21 groups,
-R 3 is a fluorine atom or OSiR a3 R b3 R c3 group, OR 22 group, OC (O) R 23 group, OCO 2 R 24 group, OCONR 25 R 26 group, OP (O) (OR 27 ) 2 group , OSO 3 R 28 group, N 3 group, phthalimidyl group, NR 29 R 30 group, NR 31 C (O) R 32 group, NR 33 C (O) OR 34 group, N (C (O) R 35 ) C (O) R represents 36 groups, N (C (O) R 37 ) C (O) OR 38 groups and N (C (O) OR 39 ) C (O) OR 40 groups,
-R 4 is a hydrogen atom or halogen atom or OSiR a4 R b4 R c4 group, OR 41 group, OC (O) R 42 group, OCO 2 R 43 group, OCONR 44 R 45 group, OP (O) (OR 46 ) Represents 2 or OSO 3 R 47 groups,
Or R and R 1 together with the carbon atom to which they are attached,
-R 8 , R 15 , R 22 and R 41 are independently of each other a hydrogen atom, an O-protecting group or a (C 1 -C 6 ) alkyl group, a (C 2 -C 6 ) alkenyl group, (C 2 -C 6) alkynyl, (C 3 -C 7) cycloalkyl group, a heterocycloalkyl group of 5-membered to 7-membered, aryl, heteroaryl, aryl (C 1 -C 6) alkyl groups, heteroaryl (Cr -C 6) alkyl group, (C 1 ~C 6) alkylaryl group, (C 1 ~C 6) alkylheteroaryl group, a sugar group or Tatomoto, these groups, a halogen atom, (C 1 ~ C 6) alkoxy, OH, Ri Contact optionally substituted by one or more groups selected from COOH and CHO,
-R 9 , R 10 , R 16 , R 17 , R 23 , R 24 , R 32 , R 34 to R 40 , R 42 and R 43 are each independently a (C 1 -C 6 ) alkyl group, (C 2 -C 6) alkenyl, (C 2 -C 6) alkynyl, (C 3 -C 7) cycloalkyl group, a heterocycloalkyl group of 5-membered to 7-membered, aryl, heteroaryl, aryl ( C 1 -C 6 ) alkyl group, heteroaryl (C 1 -C 6 ) alkyl group, (C 1 -C 6 ) alkylaryl group or (C 1 -C 6 ) alkylheteroaryl group, these groups are , halogen atom, Ri Contact optionally substituted by one or more groups selected (C 1 -C 6) alkoxy, OH, from COOH and CHO,
-R 11 , R 12 , R 18 , R 19 , R 25 , R 26 , R 29 to R 31 , R 33 , R 44 and R 45 are each independently a hydrogen atom or a (C 1 -C 6 ) alkyl group , (C 2 ~C 6) alkenyl, (C 2 ~C 6) alkynyl group, an aryl group, a heteroaryl group, an aryl (C 1 ~C 6) alkyl group, heteroaryl (C 1 ~C 6) alkyl group , selected from (C 1 ~C 6) alkyl aryl or (C 1 ~C 6) alkylheteroaryl group, these groups, a halogen atom, (C 1 ~C 6) alkoxy, OH, COOH and CHO Ri Contact optionally substituted by one or more groups,
-R 13 , R 14 , R 20 , R 21 , R 27 , R 28 , R 46 and R 47 each independently represent a hydrogen atom or a (C 1 -C 6 ) alkyl group,
-R a1 to R a4 , R b1 to R b4 and R c1 to R c4 each independently represent a (C 1 -C 6 ) alkyl group, an aryl group or an aryl (C 1 -C 6 ) alkyl group,
- R d and R e each independently represents a hydrogen atom or a (C 1 ~C 6) alkyl group. ).
- R-R 99 、R, R 10Ten 、R, R 1616 、R, R 1717 、R, R 23twenty three 、R, R 24twenty four 、R, R 3232 、R, R 3434 からRTo R 4040 、R, R 4242 及びRAnd R 4343 は互いに独立に、(CAre independent of each other (C 11 〜C~ C 66 )アルキル基、アリール基又はアリール(C) Alkyl group, aryl group or aryl (C 11 〜C~ C 66 )アルキル基を表し、これらの基は、ハロゲン原子、(C) Represents an alkyl group, these groups are halogen atoms, (C 11 〜C~ C 66 )アルコキシ、OH、COOH及びCHOから選択される1個又は複数の基によって場合により置換されており、) Optionally substituted by one or more groups selected from alkoxy, OH, COOH and CHO,
- R-R 1111 、R, R 1212 、R, R 1818 、R, R 1919 、R, R 25twenty five 、R, R 2626 、R, R 2929 からRTo R 3131 、R, R 3333 、R, R 4444 及びRAnd R 4545 は互いに独立に、水素原子又は(CIndependently of one another, a hydrogen atom or (C 11 〜C~ C 66 )アルキル基、アリール基若しくはアリール(C) Alkyl group, aryl group or aryl (C 11 〜C~ C 66 )アルキル基を表し、これらの基は、ハロゲン原子、(C) Represents an alkyl group, these groups are halogen atoms, (C 11 〜C~ C 66 )アルコキシ、OH、COOH及びCHOから選択される1個又は複数の基によって場合により置換されている、) Optionally substituted by one or more groups selected from alkoxy, OH, COOH and CHO,
請求項1に記載の化合物。2. A compound according to claim 1.
Rが、CH2OR8基を表し;R1及びR2が互いに独立に、OR15基を表し;R3が、OR22基を表し、R8、R15及びR22が、水素原子又はO-保護基を表し;
R4が、水素原子又はOR41基を表し、R41が、水素原子、O-保護基又は(C1〜C6)アルキル基、アリール基、アリール(C1〜C6)アルキル基若しくは(C1〜C6)アルキルアリール基を表し、これらの基が、無置換であり、又はハロゲン原子及び(C1〜C6)アルコキシから選択される1個若しくは複数の基によって場合により置換されている、請求項1から6のいずれか一項に記載の化合物。 R 0 represents a hydrogen atom or a (C 1 -C 6 ) alkyl group, an aryl group or an aryl (C 1 -C 6 ) alkyl group, and these groups are unsubstituted or halogen atoms, (C 1 -C 6) alkoxy, OH, is substituted by one or more groups selected from COOH and CHO;
R is, represents a CH 2 OR 8 group; R 1 and R 2 to each other independently represent OR 15 group; R 3 is represents OR 22 group, R 8, R 15 and R 22 are, water atom Or represents an O-protecting group;
R 4 represents hydrogen atom or a OR 41 group, R 41 is selected from the group consisting of water atom, O- protecting group or (C 1 ~C 6) alkyl group, an aryl group, an aryl (C 1 ~C 6) alkyl or (C 1 -C 6) alkyl aryl group, these groups are unsubstituted or optionally substituted by one or more groups selected from halogen atoms and (C 1 -C 6) alkoxy 7. The compound according to any one of claims 1 to 6 , wherein
のいずれか一項に記載の化合物。 R 0 = H, R = CH 2 OH, is R 1 = R 2 = R 3 = OH and R 4 = H or OH, claims 1 to 8
The compound as described in any one of these.
(a)下記式(II):
- m、p、R0、R5a、R6a及びR7aは、請求項1に規定のとおりであり、
- R5b、R6b及びR7bは互いに独立に、水素;(C1〜C6)アルコキシ若しくは(C1〜C6)チオアルコキシによって任意選択により置換されている(C1〜C6)アルキル;アリール;(C1〜C6)アルコキシによって任意選択により置換されているアリール(C1〜C6)アルキル;又は下記式:
(b)任意選択により、前記工程(a)で得られた化合物を塩形成又は溶媒和させて、式(I)の化合物の塩又は溶媒和物を得る工程
を含む、方法。 A process for preparing a compound of formula (I) according to any one of claims 1 to 10, comprising the following sequential steps:
(a) The following formula (II):
-m, p, R 0 , R 5a , R 6a and R 7a are as defined in claim 1,
- R 5b, independently R 6b and R 7b each other hydrogen; (C 1 ~C 6) alkoxy or (C 1 ~C 6) are substituted by optionally by thioalkoxy (C 1 ~C 6) alkyl Aryl; (C 1 -C 6 ) alkyl optionally substituted with (C 1 -C 6 ) alkoxy; or
(b) optionally comprising salt-forming or solvating the compound obtained in step (a) to obtain a salt or solvate of the compound of formula (I).
(i)下記式(IX):
(式中:
- m、p、R0、R5a、R6a及びR7aは、請求項1に規定のとおりであり、
- R5c、R6c及びR7cは互いに独立に、水素; (C1〜C6)アルコキシ若しくは(C1〜C6)チオアルコキシによって任意選択により置換されている(C1〜C6)アルキル;アリール; (C1〜C6)アルコキシによって任意選択により置換されているアリール(C1〜C6)アルキル;又は下記式:
又はR5c及びR5a並びに/若しくはR6c及びR6a並びに/若しくはR7c及びR7aは、これらが結合している窒素原子及び炭素原子と一緒になって、ピロリジン環(
(ii)任意選択により、前記工程(i)で得られた化合物を塩形成又は溶媒和させて、式(I)の化合物の塩又は溶媒和物を得る工程
を含む、方法。 A process for preparing a compound of formula (I) according to any one of claims 1 to 10, comprising the following sequential steps:
(i) Formula (IX) below:
(Where:
-m, p, R 0 , R 5a , R 6a and R 7a are as defined in claim 1,
- R 5c, independently R 6c and R 7c each other, hydrogen; (C 1 ~C 6) alkoxy or (C 1 ~C 6) are substituted by optionally by thioalkoxy (C 1 ~C 6) alkyl Aryl; (C 1 -C 6 ) alkyl optionally substituted with (C 1 -C 6 ) alkoxy; or
Or R 5c and R 5a and / or R 6c and R 6a and / or R 7c and R 7a together with the nitrogen and carbon atoms to which they are attached,
(ii) A method comprising the step of optionally salting or solvating the compound obtained in step (i) to obtain a salt or solvate of the compound of formula (I).
(1)下記式(XIa):
(式中、n、R、R1、R2、R3、R4及びR5aは、請求項1に規定のとおりである。)
を、下記式(VII)
(式中、m、p、R0、R6a及びR7aは、請求項1に規定のとおりであり、ただし、m及びpは、両方とも0ということはなく、R6d及びR7dは互いに独立に、水素; (C1〜C6)アルコキシ若しくは(C1〜C6)チオアルコキシによって任意選択により置換されている(C1〜C6)アルキル;アリール;又は(C1〜C6)アルコキシによって任意選択により置換されているアリール(C1〜C6)アルキルを表し;又はR6d及びR6a並びに/若しくはR7d及びR7aは、これらが結合している窒素原子及び炭素原子と一緒になって、ピロリジン環(
(2)任意選択により、前記工程(1)で得られた化合物を塩形成又は溶媒和させて、式(I)の化合物の塩又は溶媒和物を得る工程
を含む、方法。 m and p are not both 0 and R 5 is:
(1) The following formula (XIa):
(Wherein n, R, R 1 , R 2 , R 3 , R 4 and R 5a are as defined in claim 1).
With the following formula (VII)
(In the formula, m, p, R 0 , R 6a and R 7a are as defined in claim 1, provided that m and p are not both 0, and R 6d and R 7d are independently hydrogen; substituted by optionally by (C 1 ~C 6) alkoxy or (C 1 ~C 6) thioalkoxy (C 1 ~C 6) alkyl; aryl; or (C 1 ~C 6) Represents aryl (C 1 -C 6 ) alkyl optionally substituted by alkoxy; or R 6d and R 6a and / or R 7d and R 7a together with the nitrogen and carbon atoms to which they are attached. Pyrrolidine ring (
(2) A method comprising the step of optionally salting or solvating the compound obtained in step (1) to obtain a salt or solvate of the compound of formula (I).
(式中:
- n、m、p、R0、R、R1、R2、R3、R4、R5a、R6a及びR7aは、請求項1に規定のとおりであり、
- R5b、R6b及びR7bは互いに独立に、水素;(C1〜C6)アルコキシ若しくは(C1〜C6)チオアルコキシによって任意選択により置換されている(C1〜C6)アルキル;アリール;(C1〜C6)アルコキシによって任意選択により置換されているアリール(C1〜C6)アルキル;又は下記式:
又はR5b及びR5a並びに/若しくはR6b及びR6a並びに/若しくはR7b及びR7aは、これらが結合している窒素原子及び炭素原子と一緒になって、ピロリジン環(
- R49が、H又はO-保護基を表し、
- PGが、O-保護基を表す。)。 The following formula (II), (VI) or (XI):
( Where:
-n, m, p, R 0 , R, R 1 , R 2 , R 3 , R 4 , R 5a , R 6a and R 7a are as defined in claim 1,
- R 5b, independently R 6b and R 7b each other hydrogen; (C 1 ~C 6) alkoxy or (C 1 ~C 6) are substituted by optionally by thioalkoxy (C 1 ~C 6) alkyl Aryl; (C 1 -C 6 ) alkyl optionally substituted with (C 1 -C 6 ) alkoxy; or
Or R 5b and R 5a and / or R 6b and R 6a and / or R 7b and R 7a together with the nitrogen and carbon atoms to which they are attached,
- R 49 is, H or O - represents a protecting group,
-PG represents an O 2 -protecting group. ).
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